The initializing program design problems of the Single -Chip Microcomputer (MCS51 series) and interface chip in common use (8255A/8155 series) are reviewed in this paper by application instance.

• 本文通过应用实例,介绍了如何对单片机(MCS51系列)和常用接口芯片(8255A、8155系列)进行初始化程序的设计问题。